I'm taking action in the stackexchange network for half a year now and experienced that many of my answers got accepted on superuser.com whereas all of my answers on askubuntu weren't accepted, even if the user asking the question posted a comment to thank me for my answer.
The problem of users not accepting answers is already discussed in "Encouraging (new) users to accept answers", but this didn't help me with my problem that my answers are very more likely to be accepted on superuser. I find this very discouraging and I will therefore more likely answer questions on superuser than on askubuntu.
What I want to know is if you are experiencing the same problem and if anyone can tell me what the reasons for that are and what can be done to change this.